摘要:
Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions and high catalytic cracking activity, a method for their preparation and their use as FCC catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution. The new SAPOs may have a small crystal size and may be synthesized from a single- phase synthesis solution.
摘要:
The present invention is a large-pore aluminophosphate or substituted aluminophosphate comprising a compositionaR:(M.sub.x Al.sub.y P.sub.z)O.sub.2wherein R represents an organic templating agent, and a=0 to 0.4, X=0 to 0.4, y=0.35 to 0.5, and Z=0.25 to 0.5 and characterized by the diffraction pattern of Table 1 and M may be Si, Ga, Ge, Co, Ni, Zn, Fe, V, Ti and mixtures thereof.
摘要:
A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds and the ring opening of ring compounds present in petroleum and petrochemical streams. The process is conducted in the presence of hydrogen, one or more noble metal catalysts, and a hydrogen sulfide sorbent material.
摘要:
This invention relates to novel zeolitic compositions having zinc as well as aluminum and silicon in the framework tetrahedral positions. The composition has a structure similar to type-L aluminosilicate zeolites. The invention also involves a process of preparation in which one or more divalent transition metals is directly synthesized into the product metalo-aluminosilicate.
摘要:
A synthetic large pore crystalline metalsilicate zeolite composition, designated as ECR-35, having the formula, expressed in term of mole ratio of oxides: ##STR1## where T is an organic cation selected from the group consisting of tetraethylammonium and methyltriethyl ammonium, and mixtures thereof and X is Al or Ga; wherein the composition consists of an X-ray diffraction pattern having the line intensities:______________________________________ Line # d(.ANG.) Intensity ______________________________________ (1) 15.00 .+-. 0.2 weak to very strong (2) 14.20 .+-. 0.2 very strong (3) 13.40 .+-. 0.2 weak to medium (4) 8.70 .+-. 0.2 medium (5) 8.03 .+-. 0.2 zero to medium (6) 7.40 .+-. 0.15 medium (7) 5.65 .+-. 0.15 medium-strong ______________________________________ and wherein the intensity of line (2) is greater than line (1) which is substantially greater than the intensity of line (3); and wherein the intensity of line (4) is substantially greater than the intensity of line (6) which is greater than the intensity of line (5) and a method for preparing same.
摘要:
Highly crystalline stannosilicates are formed by reacting a tin salt with a source of silica and a hydroxide of a Group IA or Group IIA metal or an amine.
摘要:
A zeolite characterized by having an x-ray diffraction pattern as shown in Table 1, a silica to alumina mole ratio of at least six, and containing triethyl methyl ammonium, wherein said organic ammonium templates are within the super cages of said aluminosilicate, said zeolite having a hexagonal unit cell.
摘要:
High purity synthetic zeolites having open frameworks, such as offretite, uncontaminated with detectable traces of other zeolites, can be synthesized by the hydrothermal reaction of a silica source, alumina source, sodium hydroxide and/or potassium hydroxide in the presence of a zeolite nucleation slurry synthesized from a mixture of a silica source, alumina source, sodium hydroxide and/or potassium hydroxide and an organic template agent. The preferred organic template agents are the quaternary compounds wherein the central element is one from Group 5A of the Periodic Table and various conjugated aromatic compounds. The zeolite synthesis mixture itself does not contain any organic ion template agent. With this organic template agent not being required, the nucleation slurry is used to promote crystallization of the synthesis mixture to the open framework type of zeolite.
摘要:
A process to regenerate metal oxide desulfurization sorbents using an oxidizing and reducing atmosphere. The sorbents may be mono- or multi-metallic in nature, and preferably comprise Cu, Ni and/or Co. If desired, secondary metals may be incorporated to increase regeneration efficiency and/or capacity. Other additives may be used to suppress hydrocarbon cracking. A sorbent containing Zn may be combined with an Fe, Co, Ni, Mo, or W catalyst or a noble metal catalyst and combinations thereof.